mcgahan



(No Model.) 3 Sheets-Sheet 1.

P. L. MoGAI-IAN.

LOGOMOTIVE FEED WATER HEATER. W No. 456,676. Patented July 28, 1891.

(No Model.) 7 3 Sheets-Sheet 2. P. L. MOG'AHAN. LOGOMOTIVE FEED WATERHEATER No. 456,676. I Patented July 28, 1891 n -MUHrH Elwumboz svasv SQWW 86 M {Rhona 1M lmme my nmsvsrcns co wow-mun. WASHINGTON o c (NoModel.) 3 Sheets-Sheet 3. F. L. MOGAHAN.

LOGOMOTIVE FEED WATER HEATER.

Patented July 28, 1891. IIE- 7- $3 h a WWW fi I 8 5 FIE-.- LLO- UNITEDSTATES PATENT OFF CE.

FRED L. hICGAl'IAN, OF INDIANAPOLIS, INDIANA.

LOCOMOTIVE FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 456,676, dated July 28,1891.

Application filed March 2, 1891. Serial No. 383,456. (No model.)

liaust-steam from the engine-cylinders to assist the draft in thesmoke-stack and to use the remainder for heating the iced-water; second,to provide means for separating the lime and other solids held insolution in the feedwater before it enters the boiler, and, third, toprovide means for condensing the surplus exhaust-steam and collectingthe water of condensation to supplement the feedwater supply, all ashereinafter fully set forth.

The accompanying drawings illustrate my invention.

Figure 1 represents a side elevation of a locomotive having myimprovement. Fig. 2 represents a transverse section on a larger scale ata, Fig. 1. Fig. 3 represents a partial longitudinal section at Z), Fig.2. Figs. 4 and 5 represent, respectively, a side elevation and alongitudinal section showing the means for connecting the valve-rod ofthe steam-chest and the lever which operates the exhaust valve. Fig. Uis a view in perspective showing the universal swivel-coupling in theexhaust-steam pipe. Fig. 7 is a plan of the 10- coinotive-tender. Fig. 8represents a central longitudinal-section of the locomotive-tender at c,Fig. 7. Fig. 9 represents a transverse section of the locomotive-tenderat (Z, Fig. 7. Fig. 10 represents a broken longitudinal section of thetender at c, Fig. 7.

In the drawings, Fig. 1, A is the exhauststeam pipe, which extends froma point within the smoke-chamber, where it is arranged to receive theexhaust-steam from both cylinders,up and along the interior of thesmokestack to near its top, and from thence backward over the top of thecab to the feed-water heater, hereinafter described, arranged in therear of the tender.

1-3 is the ordinary val ve-rod which controls the slide-valve, therebeing one each side of the locomotive.

O is a lever pivoted to the frame of the 10- comotive and having one endarranged in the path of a pair of collars D I), Figs. eland 5, which areadjustably secured to the valverod B. The other end of lever C isconnected by means of a connectingrod E with a crank F, which isattached to a rock-shaft G, Fig. 2,which controls the discharge of theexhauststeam, as hereinafter described.

11 is a steam-pump, which is connected with the steam and water spacesof the boiler by pipes I and .I and with the tender by the water-supplypipe K and exhaust-steam pipe L. The exhaust-ports of the cylinders Mand N, Fig. 2, are arranged to discharge into a pair of cylindricalchambers O and P, which are mounted on the saddle-plate Q within thesmoke-chamber R. Said chambers are arranged with their axes at rightangles to the axis of the boiler S, and each is provided with a port T,Fig. 3, which enters the exhaust-steam pipe A, and a second port V,which enters a short pipe W, the open end of which is arrangedimmediately beneath the lower end of the smoke-stack X.

Each of the chambers is provided with a segmental valve 2, which ismounted upon and is secured to the rock-shaft G, said valve beingarranged to cover either of the ports T or V. The arrangement of thecollars D D, the lever G, crank F, and valve 2 is such that theexhaust-steam from one end of the steam-cylinder is discharged throughthe port T into the pipe A, and the steam from the opposite end of thecylinder is discharged through the port V into the smoke-stack. Thatportion of the exhaust which passes into the Smokestack assists thedraft therein, as heretofore. That portion of the exhaust which passesinto the pipe A is conducted therein to the feed-water heater andpurifier a, which is arranged in the back part of the water-space of thetender. Said feedqvater heater and purifier is similar in constructionto that shown in Letters Patent No. 427,266, which were issued to me May6, 1890. It

' into chamber 21.

consists, essential y, of an inclosed chamber 5, having in its top awater-supply pipe 6, a series of communicating drip-plates 7 in itsupper )art, and in its lower part a central well 8, surrounded by aseries of settlingchambers 9, through which the water passes insuccession until it is discharged into an in'closed chamber 10, fromwhence it is drained into a conduit 11, extending along the bottom ofthe tender at one side. The feed-Water is supplied to the heater andpurifier from the water-space 12 in the tender by means of a pump 13,which is operated by means of an eccentric 14:, mounted on an axle ofthe tender-truck, and aconne'cting-rod 15, which passes through thetender in atube 16.

For the purpose of controlling the supply of water to the heater, Iplace in one of the settling-compartments 9 a float l7,'which isarranged to operate a cut-off valve 18 in pipe 6, and thus causes thepump 13 to discharge through the branch 19 into the water-space 12.

On one side of the heater, between it and the wall of thetender, isformed an inclosed chamber 20, and on the opposite side a similarchamber 21 is formed. The exhauststeam from the engines passes from pipeA into chamber 20, and from thence through pipe 22 into the chamber 5,where it is discharged directly over the central well 8. Such portion ofthe steam as is not condensed in chamber 5 passes through an opening 23For the purpose of condensing this remaining portion of steam Iconstruct the sides of the tender with double walls and divide thespaces thus formed into a series of open-air passages 24, alternatingwith a series of steam-tubes 25, which are connected at opposite ends byshort vertical tubes 26, and the tubes 25 of the two sides of the tenderare connected by a transverse tube 27, thus forming a continuoussteam-passage, which commences at the opening 28 in chamber 21 and endsat the open pipe 29 on the opposite side of the tender. The transversetube 27 communicates also with a' conduit 34, into which the water ofcondensation from tubes 25, and also from chamber 21, is drained.Conduits 11 and are connectedby the pipe K with pump II, and theexhaust-steam from the pump is conducted to chamber 20 by the pipe L.

For the purpose of enabling the pump H to draw water direct from thewater-space of the tender in an emergency, I provide avalve 30, which iscontrolled by means of the rod 31, within convenient reach of theengineer, and which when open allows the water from the space 12 to flowinto conduit 11.

' For the purposeof preventing undue strain on the exhaust-pipe A byreason of the movement of the tender and the engine relatively to eachother, I provide in the pipe a universal swivel-joint 32. This jointalso permits the folding of the rear portion of the pipe forward in casethe tender is disconnected.

In operation at each stroke of the piston in each of the steam-cylindersa portion of the exhaust-steam passes into the smoke-stack and keeps upthe draft therein. The remaining steam is conducted to the feed-waterheater in the tender and operates, first, to heat the water to thattemperature at which it will deposit its mineral and'solid matter in thesettling-chambers of the heater, and is then, as it passes through thetubes 25, rapidly condensed by the current of air flowing through theopen passages 24. The feed-water stored in the water-space of the tenderis by the movement of the tender automatically pumped into the heater,is there heated and purified, and isthen, together with the water of condensation from the exhaust-steam, pumped into the boiler. The boiler isthus supplied with pure warm waterand kept free from scale, and aconsiderable saving in fuel is effected.

I claim as my invention 1. The combination, with the water-tank and theexhaust-port of the steam-engine of a locomotive, of a pipe arranged toconnect said exhaust-port and water-tank, a valve arranged between saideXhaust-port and pipe, and intermediate connecting mechanism connectingsaid valve and a regularly-moving part of the engine, as the valve-rod,whereby a portion of the exhaust-steam from the engine is automaticallydischarged at each stroke thereof into said pipe, substantially as andfor the purpose set forth.

2. The combination, with the water-tank, the smoke-stack, and theexhaust-port of a steam-engine of a locomotive, of a chamber arranged toreceive the steam from said exhaust-port, said chamber being providedwith two discharge-ports, one of which communicates with a pipe leadingto the water-tank and the other of which communicates with thesmoke-stack, a valve mounted within said chamber and arranged to covereither of said discharge-ports, and intermediate connecting mechanismconnecting said valve and a moving part of the en gine, whereby saidports are alternately opened at each stroke of the engine and a part ofthe exhaust-steam is discharged into the smoke-stack and the remainderis discharged into the water-tank, substantially as set forth.

3. In a locomotive-tender, the combination of the feed-water heater, thesteam-pipe arranged to enter said heater, the series of connectedsteam-passages formed in the walls of the tender and arranged to receivethe exhaust-steam from said heater, and the conduit arranged to receivethe water of condensation from said steam-passages, all arranged toco-operate substantially as set forth.

4. Ina loecmotivetender, the co mbination of the feed-water heater, thesteam-pipe arranged to enter said heater, the series of connectedsteam-passages formed in the walls of the tender and arranged to receivethe exhaust-steam from said heater, the open airpassages also formed inthe walls of the tender and arranged alternately with saidsteam-passages, and the conduit arranged to receive the Water ofcondensation from the steam-passages, all arranged to co-operatesubstantially as set forth.

5. In a locomotive-tender, the combination of the water-space of saidtender, the feedwater heater arranged adjacent thereto, the pumparranged in said Water-space, the pipe connecting said pump with theheater, and intermediate connecting mechanism connecting a moving partof the tender, as the axle of one of the trucks, and said pump, wherebywater from the water-space is automatically delivered into the heater bythe movement of the tender, substantially as set forth.

6. In a locomotive-tender, the combination FRED L. MCGAHAN.

Witnesses:

H. P. H001), V. M. HOOD.

